{"product_id":"stereo-integrity-hst-15-subwoofer","title":"Stereo Integrity HST-15 | 15 Inch Subwoofer","description":"\u003cstyle\u003e\n.si-desc{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#1e293b;max-width:1200px;margin:0 auto;background:#ffffff}\n.si-hero{background:linear-gradient(135deg,#0b0b0c 0%,#2d3139 100%);padding:52px 36px;text-align:center;color:#ffffff}\n.si-hero .si-brand{font-size:.85em;letter-spacing:.3em;text-transform:uppercase;color:#cbd5e1;margin:0 0 10px 0}\n.si-hero .si-title{font-size:2.4em;font-weight:800;letter-spacing:1px;margin:0 0 8px 0;color:#ffffff}\n.si-hero .si-subtitle{font-size:1.15em;font-weight:300;color:#e2e8f0;margin:0 0 22px 0}\n.si-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:10px}\n.si-badge{background:rgba(255,255,255,.08);border:1px solid #9ca3af;color:#f8fafc;padding:7px 18px;border-radius:20px;font-size:.88em;font-weight:600}\n.si-section{padding:44px 36px;border-bottom:1px solid #e2e8f0;background:#ffffff}\n.si-section.si-alt{background:#f5f6f8}\n.si-section h2{color:#111827;font-size:1.8em;font-weight:700;margin:0 0 18px 0;padding-bottom:10px;border-bottom:3px solid #B91C1C}\n.si-section p{font-size:1.04em;color:#334155;margin:0 0 15px 0}\n.si-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:22px 0}\n.si-card{background:#ffffff;border:1px solid #e2e8f0;border-top:4px solid #B91C1C;border-radius:8px;padding:20px}\n.si-card h3{color:#111827;font-size:1.08em;font-weight:700;margin:0 0 8px 0}\n.si-card p{font-size:.97em;color:#475569;margin:0}\n.si-note{background:#f5f6f8;border-left:5px solid #B91C1C;padding:18px 22px;margin:22px 0;border-radius:0 8px 8px 0}\n.si-note p{margin:0;color:#334155}\n.si-link{display:inline-block;background:#B91C1C;color:#ffffff;text-decoration:none;font-weight:700;padding:12px 24px;border-radius:8px;margin:6px 0}\n.si-cta{background:linear-gradient(135deg,#0b0b0c 0%,#2d3139 100%);padding:44px 36px;text-align:center;color:#ffffff}\n.si-cta h2{color:#ffffff;font-size:1.6em;margin:0 0 12px 0}\n.si-cta p{color:#e5e7eb;font-size:1.04em;margin:0 0 8px 0}\n@media (max-width:600px){.si-grid{grid-template-columns:1fr}.si-hero,.si-section,.si-cta{padding:34px 18px}.si-hero .si-title{font-size:1.8em}}\n\u003c\/style\u003e\n\u003cdiv class=\"si-desc\"\u003e\n\u003cdiv class=\"si-hero\"\u003e\n\u003cp class=\"si-brand\"\u003eStereo Integrity\u003c\/p\u003e\n\u003cp class=\"si-title\"\u003eHST-15\u003c\/p\u003e\n\u003cp class=\"si-subtitle\"\u003e15 Inch High-Excursion Subwoofer | Sold Individually\u003c\/p\u003e\n\u003cdiv class=\"si-badges\"\u003e\n\u003cspan class=\"si-badge\"\u003e40 mm One-Way Linear Travel\u003c\/span\u003e \u003cspan class=\"si-badge\"\u003e102 mm Peak Excursion\u003c\/span\u003e \u003cspan class=\"si-badge\"\u003eTriple Stacked 250 mm Motor\u003c\/span\u003e \u003cspan class=\"si-badge\"\u003eCarbon Fiber Cone\u003c\/span\u003e \u003cspan class=\"si-badge\"\u003eDual 1 or Dual 2 Ohm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-section\"\u003e\n\u003ch2\u003eLong Stroke in a 15 Inch Frame\u003c\/h2\u003e\n\u003cp\u003eThe HST-15 brings the Stereo Integrity HST series design to a 15 inch cone. The series is built for very large bass output from very small enclosures, and it gets there through stroke and motor force rather than cone size. The bifilar copper voice coil is capable of 40 mm of one-way linear travel, for 80 mm of total linear travel and 102 mm of total peak excursion.\u003c\/p\u003e\n\u003cp\u003eEach HST-15 is hand-built by Stereo Integrity in North Carolina. For enclosure modeling, Stereo Integrity specifies a driver displacement of 0.45 cubic feet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-section si-alt\"\u003e\n\u003ch2\u003eEngineering Highlights\u003c\/h2\u003e\n\u003cdiv class=\"si-grid\"\u003e\n\u003cdiv class=\"si-card\"\u003e\n\u003ch3\u003e250 mm Triple Stacked Motor\u003c\/h3\u003e\n\u003cp\u003eA large triple stacked motor with three shorting rings provides the force to control a cone moving this far, which is why the motor is so tall relative to the basket.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-card\"\u003e\n\u003ch3\u003eBifilar Copper Voice Coil\u003c\/h3\u003e\n\u003cp\u003eThe bifilar copper coil delivers 40 mm of one-way linear travel, with the shorting rings working to hold inductance down across the stroke.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-card\"\u003e\n\u003ch3\u003eFlat, Linear Suspension\u003c\/h3\u003e\n\u003cp\u003eA wide soft foam surround and a three layer, 10 inch natural Nomex spider keep compliance flat and linear, and sewn-on flat voice coil leads eliminate lead tap.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-card\"\u003e\n\u003ch3\u003eCarbon Fiber Sandwich Cone\u003c\/h3\u003e\n\u003cp\u003eThe carbon fiber sandwich cone and dust cap keep cone stiffness very high, mounted in a high-clearance cast aluminum frame with large 4 AWG push terminals.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-section\"\u003e\n\u003ch2\u003eChoosing Your Version\u003c\/h2\u003e\n\u003cp\u003eThe HST-15 is available in dual 1 ohm and dual 2 ohm. Wire dual 1 ohm coils to 0.5 ohm in parallel or 2 ohms in series, and dual 2 ohm coils to 1 ohm in parallel or 4 ohms in series.\u003c\/p\u003e\n\u003cdiv class=\"si-note\"\u003e\u003cp\u003e\u003cstrong\u003ePlanning note:\u003c\/strong\u003e Beyond the 0.45 cubic foot displacement, Stereo Integrity's product page does not list a Thiele-Small parameter set, power rating, or mounting dimensions for the HST-15. The Klippel report in the gallery shows its measured force factor and suspension stiffness curves. Call us before you plan an enclosure and we will help with the details.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-section si-alt\"\u003e\n\u003ch2\u003eOrdering\u003c\/h2\u003e\n\u003cp\u003eEach HST-15 is hand-built to order and ships separately. Stereo Integrity lists a 90 pound shipping weight, so call 931-563-5151 before you order for current lead time and delivery options.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-cta\"\u003e\n\u003ch2\u003eAuthorized Stereo Integrity Dealer\u003c\/h2\u003e\n\u003cp\u003eAudio Intensity is an authorized Stereo Integrity dealer, and we build enclosures around their drivers.\u003c\/p\u003e\n\u003cp\u003eCall 931-563-5151 to plan an HST-15 build.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Stereo Integrity","offers":[{"title":"Dual 1 Ohm","offer_id":44924067840089,"sku":"SI-HST15-D1","price":1199.99,"currency_code":"USD","in_stock":false},{"title":"Dual 2 Ohm","offer_id":44924067872857,"sku":"SI-HST15-D2","price":1199.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/stereo-integrity-hst-15-front.jpg?v=1789576602","url":"https:\/\/audiointensity.com\/products\/stereo-integrity-hst-15-subwoofer","provider":"Audio Intensity","version":"1.0","type":"link"}